You can change the name of the cluster and assign a different server to be the primary cluster member.
On the Home page, click Access Gateways > [cluster name] > Edit.
Modify the following fields:
Name: Specify a name for the cluster.
Description: Specify the purpose of the cluster. This is optional, but useful if your network has multiple Access Gateway clusters.
Primary Server: Indicates which server in the cluster has been assigned to be the primary server. To change this assignment, select the server from the list.
To modify details about a cluster member, click the server name in the Cluster member list.
Click OK.